package com.atguigu.gulimall.ssoclient.controller;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.client.RestTemplate;

import javax.servlet.http.HttpSession;
import java.util.ArrayList;
import java.util.List;

/**
 * @program: gulimall
 * @description:
 * @author: 江天赐
 * @create: 2022-08-13 16:52
 */
@Controller
public class HelloController {
    @Value("${sso.server.url}")
    String ssoServerUrl;

    /**
     * 无需登录就可访问
     *
     * @return
     */
    @ResponseBody
    @GetMapping("/hello")
    public String hello() {
        return "hello";
    }

    /**
     * 感知这次是在ssoserver登陆成功回来
     *
     * @param model
     * @param session
     * @param token   只要去ssoserver登录成功跳回来就会带上token
     * @return
     */
    @GetMapping("/employees")
    public String employees(Model model, HttpSession session, @RequestParam(value = "token", required = false) String token) {
        if (!StringUtils.isEmpty(token)) {
            //只要去ssoserver登录成功跳回来就会带上token
            //取ssoserver获取当前token真正的信息
            RestTemplate restTemplate = new RestTemplate();
            ResponseEntity<String> forEntity = restTemplate.getForEntity("http://ssoserver.com:8080/userInfo?token=" + token, String.class);
            String body = forEntity.getBody();
            session.setAttribute("loginUser", body);
        }
        Object loginUser = session.getAttribute("loginUser");
        if (loginUser == null) {
            //没登录跳转到登录服务器
            //跳转过去以后，使用url查询参数标识我们是哪个页面，好登录成功之后返回
            // redirect_url=http://client1.com:8080/employees
            return "redirect:" + ssoServerUrl + "?redirect_url=http://client1.com:8081/employees";
        } else {
            List<String> emps = new ArrayList<>();
            emps.add("张三");
            emps.add("李四");
            model.addAttribute("emps", emps);
            return "list";
        }
    }
}
